Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-89453
Published: September 12, 2026
Vulnerability identifier: #VU149364
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89453
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to failure to release a PCI device reference in iommu_call_iopf_notifier() when handling PPR faults. A local user can trigger PPR fault handling to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89453
Install security update from vendor's repository.